Project Logs

Collapse logs

• Last pieces come together

  Daniel Nikolajsen • a day ago • 0 comments

  The final prototype circuit board is now finished, with a NodeMCU and two stepper drivers soldered directly onto the board. 

  Also the first firmware is finished and I can start testing it out. The first attempts worked fine, but I need to tune up the stepper drivers to give some more torque. They can handle at least 1A but are only pulling around 0.2A right now.

  Next it's time to get the android app together...

• Hack in Black

  Daniel Nikolajsen • 2 days ago • 0 comments

  Nothing beats a semi-gloss black finish. All the 3D-printed parts are also supposed to be black when I start production but I had a lot of white filament that had to suffice for the prototype. 

  Also I am awaiting a shipment of nice black screws for the finished kits, the plated ones on the prototype are just stuff I had laying around.

  As you can see I have also fitted the first CNC-cut sides in black plastic, and also painted the top aluminium cover. 

  The firmware is also coming along steady so hopefully I can present you with a demonstration video within a week.

• Time to test the firmware

  Daniel Nikolajsen • 4 days ago • 0 comments

  The very first prototype circuit board has been soldered together, and the first trials have worked perfectly! 

  However, there are a lot of features left to code for the "firmware". But as of now it can create a wifi access point with a setup page, and then store your wifi credentials and run a web server on your local wifi. Also it can turn two stepper motors without any hickups, but I couldnt try the limit switches today since i was missing some resistors. 

  All in all, everything is going according to schedule...

• The circuit boards are amazing!

  Daniel Nikolajsen • 6 days ago • 0 comments

  Today the PCBs arrived from china. Absolutely amazing! It almost angers me how skilled and cheap the asians are, but for my project it's crucial to be able to buy a batch of prototype circuit boards without breaking the bank.

  Everything was beyond expectation. Perfect fit, precision and hair-fine screen print on top. Time to get the soldering iron out and put together the very first prototype...

• Prototype get its casing

  Daniel Nikolajsen • 01/09/2021 at 16:35 • 0 comments

  Now all the mechanicals for the first prototype is finished, perhaps just a slab of black paint on the top aluminium cover.

  Also DHL sent me a notice that the PCBs probably will arrive after the weekend, so I can start testing out the software. That is IF the circuit boards work as intended of course... *fingers crossed*

• Parts list, IKEA-style

  Daniel Nikolajsen • 01/07/2021 at 14:01 • 0 comments

  Every kit needs a great bill of materials so you can check that you've got all the parts you need. The first draft of my BOM is now finished, but it's possible the final MK1 release will have some edits before launch.

  You can find the full BOM as a pdf in the project files or on www.danaco.se
  

• Setup for dummies

  Daniel Nikolajsen • 01/04/2021 at 18:13 • 0 comments

  The NodeMCU code is slowly coming alive, while I wait for the first batch of PCBs to arrive from the factory. The board will have a small reset button that turns the controller back into an access point. Then you can connect directly to the wifi on the satellite tracker, access the setup page directly with your browser and supply the correct Wifi settings. 

  This way you don't need any special equipment or USB-connection for setting it up. Just plug it in and go, almost like a chromecast.

  There are some different software choices on the market for controlling Az-El rotators, and it will hopefully be possible to control the hardware with more programs than my own android app. 

  What software do you prefer? Leave a comment if you have any suggestions.

• My first PCB, not too bad

  Daniel Nikolajsen • 12/27/2020 at 20:16 • 0 comments

  Electronics are definitely not my strong suit, but for the first time ever I've designed a PCB-layout and I must say, it looks quite good don't you think!?

  I am using the free software EasyEDA. Not the simplest to work with, especially when you don't know the name of all the components. But after a few hours I got the hang of it. 

  And just as I wrote that last sentence, I realized that I need to add a reset push button to it for the wifi setup. Damn. Back to the drawing board!

• Love your worms

  Daniel Nikolajsen • 12/25/2020 at 19:30 • 0 comments

  It's getting somewhere! Christmas is over and the project continues. Today I designed the worm gear that will drive the elevation of the antenna. This is great not only because it makes the drive stronger, but also allows for the motors to be stacked on top of each other to save space, to make everything fit inside the housing.

  Soon it's time for some electronics!

• Only small balls here

  Daniel Nikolajsen • 12/22/2020 at 21:59 • 0 comments

  Today I got some more prints finished and started mounting the bottom turntable. Hopefully all the ball bearings won't give too much friction.

  For the entire build to be easy assembled, I just realised that it needs a custom expansion circuit board with connectors for the processor and stepper motor drivers etc. There are a few online circuit board design tools and chinese producers that offer PCBs for only a few dollars a piece. Something I havent tried before, but I'm sure I'll sort it out somehow...

View all 11 project logs